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CVE-2026-117603 (GCVE-0-2026-117603)

Vulnerability from nvd – Published: 2026-10-27 13:09 – Updated: 2026-10-27 13:09

Title

Electrum before 4.7.2 Nostr Wallet Connect Plugin Daily Spending Limit Bypass

Summary

Electrum before 4.7.2 contains a spending limit bypass vulnerability in the Nostr Wallet Connect plugin that allows malicious NWC clients to exceed daily_limit_sat by exploiting non-atomic budget checks and millisatoshi truncation. Attackers can send concurrent pay_invoice requests that pass budget_allows_spend() before add_to_budget() runs, or repeatedly pay msat amounts that are floored to whole satoshis, to drain funds beyond the limit.

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6928 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/spesmilo/electrum/security/adv…	vendor-advisory
https://github.com/spesmilo/electrum/commit/52223…	patch
https://github.com/spesmilo/electrum/commit/3956b…	patch
https://www.vulncheck.com/advisories/electrum-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spesmilo	electrum	Affected: 0 , < 4.7.2 (semver) Unaffected: 4.7.2 (semver) cpe:2.3:a:electrum:electrum::::::::

Date Public

2026-04-28 00:00

Credits

maru1009

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "electrum",
          "vendor": "spesmilo",
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              "status": "unaffected",
              "version": "4.7.2",
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        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
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CVE-2026-117602 (GCVE-0-2026-117602)

Vulnerability from nvd – Published: 2026-10-27 13:09 – Updated: 2026-10-27 13:09

Title

Electrum before 4.7.2 External Plugin Authorization Bypass Local Code Execution

Summary

Electrum 4.6.0 before 4.7.2 contains an authorization bypass in the external plugin loader, which executes a plugin's __init__.py module when the plugin is marked enabled in the config file, without verifying its plugin-password signature. A rogue local process with write access to the Electrum data directory can place plugin code in the plugins/ folder and mark it enabled, causing arbitrary code execution inside the Electrum process.

Severity

8.6 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6928 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/spesmilo/electrum/security/adv…	vendor-advisory
https://github.com/spesmilo/electrum/commit/032df…	patch
https://github.com/spesmilo/electrum/commit/fd716…	patch
https://www.vulncheck.com/advisories/electrum-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spesmilo	electrum	Affected: 0 , < 4.7.2 (semver) Unaffected: 4.7.2 (semver) cpe:2.3:a:electrum:electrum::::::::

Date Public

2026-04-28 00:00

Show details on NVD website

JSON

To clipboard

{
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          "vendor": "spesmilo",
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      ],
      "metrics": [
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            "Recovery": "NOT_DEFINED",
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CVE-2026-117601 (GCVE-0-2026-117601)

Vulnerability from nvd – Published: 2026-10-27 13:09 – Updated: 2026-10-28 16:16

Title

Electrum before 4.8.3 Missing Signature Verification of Mempool Transactions

Summary

Electrum before 4.8.3 fails to verify signatures of wallet-owned inputs in unconfirmed mempool transactions, allowing malicious servers to replace a just-broadcast transaction with a conflicting one. Attackers can swallow the user's transaction and display an invalid zero-fee copy paying an attacker address, tricking users into RBF fee-bumping and signing it.

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 15:56 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6928 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/spesmilo/electrum/security/adv…	vendor-advisory
https://github.com/spesmilo/electrum/commit/90fe3…	patch
https://www.vulncheck.com/advisories/electrum-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spesmilo	electrum	Affected: 0 , < 4.8.3 (semver) Unaffected: 4.8.3 (semver) cpe:2.3:a:electrum:electrum::::::::

Date Public

2026-10-24 00:00

Credits

Raju-K12

Show details on NVD website

JSON

To clipboard

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CVE-2026-117603 (GCVE-0-2026-117603)

Vulnerability from cvelistv5 – Published: 2026-10-27 13:09 – Updated: 2026-10-27 13:09

Title

Electrum before 4.7.2 Nostr Wallet Connect Plugin Daily Spending Limit Bypass

Summary

Electrum before 4.7.2 contains a spending limit bypass vulnerability in the Nostr Wallet Connect plugin that allows malicious NWC clients to exceed daily_limit_sat by exploiting non-atomic budget checks and millisatoshi truncation. Attackers can send concurrent pay_invoice requests that pass budget_allows_spend() before add_to_budget() runs, or repeatedly pay msat amounts that are floored to whole satoshis, to drain funds beyond the limit.

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N

CWE

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6928 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/spesmilo/electrum/security/adv…	vendor-advisory
https://github.com/spesmilo/electrum/commit/52223…	patch
https://github.com/spesmilo/electrum/commit/3956b…	patch
https://www.vulncheck.com/advisories/electrum-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spesmilo	electrum	Affected: 0 , < 4.7.2 (semver) Unaffected: 4.7.2 (semver) cpe:2.3:a:electrum:electrum::::::::

Date Public

2026-04-28 00:00

Credits

maru1009

Show details on NVD website

JSON

To clipboard

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CVE-2026-117602 (GCVE-0-2026-117602)

Vulnerability from cvelistv5 – Published: 2026-10-27 13:09 – Updated: 2026-10-27 13:09

Title

Electrum before 4.7.2 External Plugin Authorization Bypass Local Code Execution

Summary

Electrum 4.6.0 before 4.7.2 contains an authorization bypass in the external plugin loader, which executes a plugin's __init__.py module when the plugin is marked enabled in the config file, without verifying its plugin-password signature. A rogue local process with write access to the Electrum data directory can place plugin code in the plugins/ folder and mark it enabled, causing arbitrary code execution inside the Electrum process.

Severity

8.6 (High)


                        
                          CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

8.4 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6928 records in the last 180 days details

References

4 references

URL	Tags
https://github.com/spesmilo/electrum/security/adv…	vendor-advisory
https://github.com/spesmilo/electrum/commit/032df…	patch
https://github.com/spesmilo/electrum/commit/fd716…	patch
https://www.vulncheck.com/advisories/electrum-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spesmilo	electrum	Affected: 0 , < 4.7.2 (semver) Unaffected: 4.7.2 (semver) cpe:2.3:a:electrum:electrum::::::::

Date Public

2026-04-28 00:00

Show details on NVD website

JSON

To clipboard

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CVE-2026-117601 (GCVE-0-2026-117601)

Vulnerability from cvelistv5 – Published: 2026-10-27 13:09 – Updated: 2026-10-28 16:16

Title

Electrum before 4.8.3 Missing Signature Verification of Mempool Transactions

Summary

Electrum before 4.8.3 fails to verify signatures of wallet-owned inputs in unconfirmed mempool transactions, allowing malicious servers to replace a just-broadcast transaction with a conflicting one. Attackers can swallow the user's transaction and display an invalid zero-fee copy paying an attacker address, tricking users into RBF fee-bumping and signing it.

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

7.5 (High)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

SSVC

Exploitation: none Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-10-28 15:56 UTC

CWE

CWE-347 - Improper Verification of Cryptographic Signature

Assigner

VulnCheck CNA under the mitre root

CNA scorecard B 84/100 over 6928 records in the last 180 days details

References

3 references

URL	Tags
https://github.com/spesmilo/electrum/security/adv…	vendor-advisory
https://github.com/spesmilo/electrum/commit/90fe3…	patch
https://www.vulncheck.com/advisories/electrum-bef…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
spesmilo	electrum	Affected: 0 , < 4.8.3 (semver) Unaffected: 4.8.3 (semver) cpe:2.3:a:electrum:electrum::::::::

Date Public

2026-10-24 00:00

Credits

Raju-K12

Show details on NVD website

JSON

To clipboard

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Find a vulnerability

Search criteria

6 vulnerabilities found for electrum by spesmilo

CVE-2026-117603 (GCVE-0-2026-117603)

CVE-2026-117602 (GCVE-0-2026-117602)

CVE-2026-117601 (GCVE-0-2026-117601)

CVE-2026-117603 (GCVE-0-2026-117603)

CVE-2026-117602 (GCVE-0-2026-117602)

CVE-2026-117601 (GCVE-0-2026-117601)